Diode laser vs IPL, and why the difference matters.
A diode is a true laser firing one precise wavelength (around 800nm) deep at the follicle. IPL is a broad flash of many wavelengths that scatters across the skin. The diode is more effective, more comfortable, and far safer on darker skin — and if a deal advertises “laser” for a suspiciously low price, it is almost always IPL.
In short
- Diode = one wavelength. Precise, deep, efficient — tuned to the follicle.
- IPL = many wavelengths at once. Some useful, much of it wasted in (and absorbed by) the skin.
- Skin tone. Diode treats all Fitzpatrick types safely; IPL is genuinely risky on IV–VI.
- Results. Diode usually reaches a better result in fewer sessions.
- The label trap. Most cut-price “laser” offers are actually IPL — always ask.
The honest headline first
“Laser” and “IPL” get used as if they mean the same thing. They don't — and the gap between them decides how well your treatment works, how comfortable it feels, and whether it's safe for your skin.
A diode laser is a true laser. IPL (Intense Pulsed Light) is not. Both use light to target hair, but they go about it so differently that the results, and the risks, are worlds apart.
What a diode laser actually is
A diode laser produces a single, pure wavelength of light — around 800nm. One colour, one job. That wavelength is chosen because it travels deep enough to reach the hair follicle while being absorbed mostly by the pigment in the hair rather than the skin. The energy is focused, predictable, and tunable: a trained practitioner can dial it precisely to your skin and hair.
What IPL actually is
IPL is closer to a very bright camera flash. It fires a broad spectrum of many wavelengths at once, through a filter. Some of those wavelengths help; many are the wrong ones and get absorbed by the skin instead of the hair. It's a scattergun where the diode is a marksman — which means more of the energy is wasted, and more of it lands where you don't want it.
Why one wavelength beats many
Because the diode puts its energy exactly where it's needed, it disables more follicles per pass with less collateral heat in the skin. That translates to better hair reduction, fewer sessions, and — paired with contact cooling — a more comfortable experience. IPL's scattered energy is less efficient on the hair and harder on the skin, especially darker skin where there's more pigment near the surface to absorb the stray wavelengths.
Diode vs IPL, side by side
| Diode laser | IPL | |
|---|---|---|
| Light | One precise wavelength (~800nm) | Many wavelengths at once |
| Is it a laser? | Yes | No |
| Skin tones | All types, I–VI | Best on pale skin; risky on IV–VI |
| Comfort | High with contact cooling | Variable, more surface heat |
| Sessions | Usually fewer | Often more, for less result |
So why does IPL still exist?
Mostly cost. IPL machines are cheaper to buy and run, so they're common in spas and on deal sites — frequently marketed as “laser” because the word sells. That's the bit to watch: a low “laser” price is the single biggest clue you're actually being offered IPL. There's nothing dishonest about offering IPL itself; the problem is calling it laser, and using it on skin it isn't safe for.
What we use, and why
At Mikki's we use a Venus Velocity 800nm diode laser with sapphire contact cooling that holds the skin near 5°C as it works, monitored a thousand times a second. It's a Class IV medical device — a genuine laser, chosen precisely so we can treat every skin tone safely and effectively, including the darker skin many clinics turn away. If you're comparing clinics, ask one question: “Is it a diode laser, or IPL?” The answer tells you most of what you need to know. Read more on our technology page.
Common questions.
Is IPL the same as laser?
Which is better, diode laser or IPL?
Is IPL safe on dark skin?
Does a diode laser hurt more than IPL?
How can I tell if a clinic uses real laser or IPL?
Is a diode laser worth the extra cost over IPL?
Laser, not IPL.
A medical-grade 800nm diode with contact cooling, safe for every skin tone. Free consultation and patch test before anything — one minute from Aldgate Underground.
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